Hyperparathyroidism (HPT) results when there is excessive secretion of parathyroid hormone (PTH).1 PTH is secreted by the four parathyroid glands, located in the neck behind the thyroid gland. Parathyroid hormone regulates serum calcium and phosphate levels and also plays a part in bone metabolism. High levels of PTH cause serum calcium levels to increase and serum phosphate levels to fall.
This is a companion discussion topic for the original article at https://patient.info/doctor/endocrine-disorders/hyperparathyroidism-pro